Came across a few of these porcelain insulators in a local antique store today. Kind of fun to see something totally unexpected, don't think I've ever encountered foreign porcelain in Vermont . It has a glaze marking LORENZETTI / 1989 MADE IN BRAZIL. Neither the 1982 Worldwide Porcelain Insulators by Albers and Tod, or the 1986 Supplement, lists this company. I'm also clueless as to the U Number. I'm sure it must be documented somewhere and would very much appreciate at least the U Number. Very well made, 3 1/4 " wide by 3 1/2 " tall. Thanks.